Robert g



(No Model.)

R. 0. TOTTEN.

ROLL AND' PINION.

No. 399.295. .PatentedMa'r. 12. 1889.

w n I Fzf 5 greatei Satisfaction in other ways.

U ITED STATES PATENT 'OFFICE ROBERT TOTTEN, OF ALLEGHENY, PENNSYLVANLL'noLL AND PIN IO.N.

SPECIFICATION forming part of Letters Patent No. 399,295, dated March12, 1889.

Application filed January ll, 1889. Serial No. ?98,096. (No model.)

Tll whom it may concern:

' Be it known that I, ROBERT C, TOTTEN,

i steel body and having athin shell or facing resident of Allegheny, inthe county of Allegheny and State of Pennsylvauia, have in 5 Vented anew and useful In provement in Rolls and Pinions; and I do herebydeclare the followin g to be a full, clear, and exact description tionsis obtained, and one which is not liable thereof.

My invention relates to the rolls and pini ionsem'ployed inrolling-mills for the rolling of iron, steel, or other metals. Thestrongest form of rolls and pinions heretofore manu-' factured have beencomposed of steel, a" low grade of Bessener or open-hearth steel beingstrains than the ordinary'cast-iron rolls which enployed for the"purpose, and it being found. that such steel I 'OllS Will Withstandheavier j strong steel body all the advantages obtaned 'were previouslyand are' still to agreat extent employed, and the steel rolls giving` Aserious diificulty in the forming of such 'olls and pinions has beenfound, however, in that there was liability of the necks or j ournals ofthese rolls being porousthat is, having blow holes or cells thereineither in the face of the casting when' coming from the mold ordiscovered by the turning of of such face in t-U--g To these ends n yinvention consists, generally stated, in a roll or pinion formed of a tocollectthe dirt or scale and cut out the journal, nor to'heat up rapidlyduring the operation of the rolls.

It also consists inconbining with such roll having a steel body and achilled cast-ironshell or face on thenecks or journals a chilledcast-iron shell or facing upon the workingsurface of the "roll, soconbining with the in the solid chillcd-iron roll.

To enable others skilled in the art to make and use my invention, I willdescribe the same more fully, referring to the aeconpanying drawings, inwhich- Figure l is a longitudinal section of a pinion enbodying nyinvention. Fig. '2 is a like View of a roll containing the same. Fg. 3is i a like View of a roll having the chilled eastiron shell or facingupon the nccksor jouring the journals and though in making such i nalsand workin -surface of the roll, and Fig.

castings attempts have been .made to overof the metal above it, thisdifficulty has not been overcome. hen such cells or nper';

fections cxistin the. neeks or journals of the A for'med of a low orsoft grade of steel-such 45 journals, and therefore to the loss ofconsidg erable time in the working of the roll.

The object of my invention is to provide a roll orpinion in 'which thesedifficulties are overcome, and in which amore perfectjournal-face`practically 'free fron such impcrfec- 'tions and one whichis not so liable to heat v up can be obtained. g y

4 is a longitudinal section of a nold suitable come these bytheemploynent of along sinkerfor carrying out'ny invention. head, so as tocompact the cast by the weight Like letters of reference indicatelikeparts in each.

As shown in said several figures, the body or main portion a of therollsor pinions'is as Bessemer and open hearth--in order to obtain all thedesired tensile or transverse strength to' sustain the' strains to whichit may be subjected, and I include under the term `steel a steel or ironas low'or free from carbon as can be properly nelted and cast within anold. Upon the necks or journals b of the roll or pinion I f'orn theshell 01' facing c, which is eomposed of chilled eastiron, such thinshellsor facing being united to the steel body by fusion in such way asto forni practically one casting. -On the working surface of the roll,as shown in. Fig. 3, is a like shell or faci-ng, d; of chilledcast-iron, united tothefbody of the roll in the same nanner, so that insuch roll the body portion a, including the necks or jonrnals b and wab-IOO hlers or connecting portions e, are forned of steel, while theshells or facings c upon the neeks and the shell or facing upon theworking-face are tormed of ehilled eastriron. The shells or fari'gs uponthe necks or journals need not bo 'fo'rned ioro than about-threefourthsof an ineh in thiekness, as after they are once turned and trued thereis praeti'cally no appreeiable wear thereon, and the shell or facing don the body of the roll is preferabl-y made from' three-fourths to oneand one-half e ineh. in thickness to provide for the turning rfaeing ofthe working portion of the roll when necessary` I J In forming myimproved roll or pinion'I employ a mold of suitable Construction, thatshown in the drawings being such mold as is required for the fornationof a roll having both' facings of chilled cast-iron on the necks and theworking portion .of-.a rol l, and the mold having the ehillf, forforming the necks or journals, and the chili g, for 'forning theworking-face d, the mold having the ordinary pouringate hcommunieating-with the moldcavit-y, preferably below the lowermold-ehill, f, and having also the sinker-head k-and a gutter or secondgate, Z, leading therefrotn, through which any extra metal can escape.

- In casting the roll I take 'a suitable mixture of cast-iron, whichwill chili properly when incontact with the mold-chills, and I melt asuicient quantity thereof either to fill or to partially fill the mold,and I also -1nelt ready for-castin a proper portion' of low-gradesteelesuch as Bes'semer or openhearth steel. The cast-iron is firstpoured;

into the n old,preferably through the pouring-gate h, and in 'passingdown into the mold enters' at the base thereof and rises within thenold, either filling or partiallyefilling' the same,'and when it comesin 'Contact with the several surfa'ces of the mold-chills it I chills oroongeals quickly, forning the ehilled oast iron, will force out thecast-iron which has -"place-within the mold-cavity., The steel in thisfilling the nold while in a molten'condition unites' with the cast-ironwhich has been prevu'sly filled the wabbler and 'take *its body and a'thin shell or facing of chilled?" chilled by the nold -chill of themold, the union'loeing formed by the fusion of the surfaces of themetals and a 'perfect union which it is practically inpossible toseparate, even by crushing, being, obtained. v

In forming pinions or rolls which have not the chilled cast-iron shellor facing on the` working-portion thereof the mold employed ispraetieally the same, eXcepttha-t the mold I for forming theworking-face or pinion-face of the roll or pinion is composed of sandorother suitable material, instead of 'the cast- 4 iron mold-chill, andthe operation of casting them is practically the same.

The mo'ld' 'is thus fornedof the main or bodyportion a, the journals b,and the wabe blers or'connecting portions e, com posed of a low grade ofste'el, and the chilled east-iron shells or faeings' cupon the neeks orjournals;

and the like shell or facin g d upon the work- *ing-surface 'of theroll, united to the steel body thereof by fusion. Thechilling'of thesuch'manner that the form ation ofblow-holes, cells, or likeimpejrfections 'is practically impossible, and a solidpracti'cally-perfeet-surface for the journals and working-surface isobtained, and when suehchilled cast-iron shells or surfaces are turnedand trued practi- 'cally solid and perfect surfaee's forth'e jour--nal's and working portion .of the 'roll are obsaid shells or faeingsc'dcompacts them in t'ained, thus overconing the principal objece tion'tothe ordinary steelroll-or pinion.

i The ehilled cast-iron shells or facin'gs on the ncks or journals,forn'ed as above deseri bed, have the further advantage that as a morecompact and solid metal isemployed for such facings they are not nearlyso liable to heat up under the heavy strain brought upon them during therolling operation "and therefore run more easily 'and require less'power to operate r 'What I ela'inas ny i'nvetion, and desirc to. secureby Letters Patent, is-

1. .A roll or' pinion forrollingnetals, havingasteelbody and'a thinshell 'orfaeing of ehilled ast-iron upon tho-ueoks or journals of theroll, substantially as and for the pur poses set forth.

2. A rollforrolling meta-is, having a steel east-,iron upon-the 'neeksor journals, and

i upon the working-surface of the roll, substanv tially as and for thepurposes set forth.

Intestimony whereof I, the said ROBERT C. TOTTEN, have hereunto set myhand.` T

ROBERT C. TOTTEN. lvitnessesz 4 .I. N. CO'OKE, ROBT. D. TOTTEN..

ICC

